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2000 Silverado service engine soon light comes on at 3/4 tank


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t.owens62
New User

Nov 6, 2011, 5:42 PM

Post #1 of 4 (2721 views)
2000 Silverado service engine soon light comes on at 3/4 tank Sign In

I have a 2000 Chevy Silverado with a V-8 (not sure which size)
When the gas tank gets to 3/4 the service engine soon light comes on. The code has something to do with the fuel system.
I put on a new gas cap and had the light reset, but still have the problem. Any ideas?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Nov 6, 2011, 7:08 PM

Post #2 of 4 (2696 views)
Re: 2000 Silverado service engine soon light comes on at 3/4 tank Sign In

What's the exact code number?



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



t.owens62
New User

Nov 9, 2011, 7:07 PM

Post #3 of 4 (2664 views)
Re: 2000 Silverado service engine soon light comes on at 3/4 tank Sign In

The code that shows up is P0440


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Nov 9, 2011, 7:14 PM

Post #4 of 4 (2661 views)
Re: 2000 Silverado service engine soon light comes on at 3/4 tank Sign In

That is a generic code for the EVAP emission system. That is the system that monitors and captures fuel vapors from the tank. That specific code is generic and there will likely be a more specific factory code stored there also but it may take a professional scan tool to access it. It will definitely take one to diagnose it along with a smoke machine. This code will have absolutely no effect on the way the vehicle runs. It's emissions only



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.







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